Compressor for refrigerating units



./sepf. 29, 1925." 1,555,394

W'. WILSON COMPRESSOR FOR REFRIGERATING UNITS' Filed sept. 24, 1524 2,S`seets-Sheet 1 il E AMM V K-W/IN.

vWILLIAM WILSON {NVENTOR B-Y M ATTORNEY Sept. 29, 1925.

W. WILSON COMPRESSOR ROR REFRIGERATING UNITS Filed sept. 24, 1924 2 sheets-sheet 2 WILLIAM WILSON INVENTOR ATTORN EY Patented Sept. 29,1925. r

PATENT OFFICE.

WILLIAM WILSON, F BROOKLYN, NEW YORK.

COMPRESSOR FOR REFRIGERA'IING UNITS.

Application ledSeptember 24, 1924. Serial No. 739,625.

To all lwhom t may concern.' y

Be it known that I, WILLIAM WILSON, a citizen of Vthe United States, residing at Brooklyn, in the county of Kings and State of New York, have invented new and useful Improvements in Compressors for Refrigerating Units, .of which the following is a specification.

This invention relates to a compressor for a refrigerating machine such as would be especially adaptable for household purposes, embodying the elements of simplicity, safety, and automatic operation. The prime object of this invention, therefore, is to provide a compact construction, with enclosed and protected mechanism, silent` in operation, containingP a self-lubricating system, and free from the danger of harmful and explosive gases. A further object is to pro- 20 vide a simple method of assembly, so as to lower the cost of manufacture and enable ready inspection and easy replacement of* parts.

To accomplish these objects there is employed a hollow casing, preferably in the form of a pipe, sealed at both ends with an arrangement of flanged plates, this casing or pipe serving a double purpose, namely,V

as support for the compressor mechanism, and as a receiver for the refrigerant. Contained andentirely enclosed within this casing is an electric motor directly connected with a system of gearing which actuates 'a reciprocating compressor piston, the motor being 'lubricated by an independent wiping system, the gearing by lubricating grease contained within an inner gear casing,land the piston by an arrangement of oil reservoirs contained within one of the end lflanges of which the compressor cylinder is an 'integral part; the inner gear casing being provided.

with parallel extension bars serving both as a support for the motor and as an abutment against the flanged plates to prevent vibration and rattling of the motor-gear arrangement; and 'theflanged plates being suitablysupplied with inlet and outlet openings for the refrigerating'fluid.

Referring to the drawings:

Figure 1 is a plan view, showing a part 50 section of the assembled compressor unit, with gear casing cover removed.

Figure 2 is a front elevation and Figure 3 a cross-sectional side elevation of the cyliIder flange, showing oil reservoirs with p ugs.

Figure L1 isa plan view and Figure 5 an end elevation of the gear casing, showing extension bars and casing cover.

In the drawings, 1 is the casing contain- 60 ing the motor 2 connected through shaft 3 tol gear 4: ywhich motivates bevel gear 5. This bevel gear is attached to shaft 6 that rotates within bearing 7 forming part of the gear casing 8. ,Attached to the bevel gear is connecting rod 9 which is connected to piston rod 10 and actuates piston 11. The compressor cylinder l2 within which the piston travels is an integral part of the flangedl plate 13, and is lubricated by the oil reservoirs 14 communicating with the cylinder by means of the oil channels 15, the reservoirs and channels being shown in Figures 2 and 3. These oil reservoirs are sealed by plugs 16 or by other suitable 75 means. The inlet piping'forthe refrigerant is connected to flanged plate 17 through opening 18; and the inlet into the com- -pressor cylinder comprises the passages 19,l

the passage 20 running through the piston $0 rod and piston, and a suitable'inlet valve situated at ythe head end 21 of the piston. The outlet valve 22 is situated'within the exhaust chamber 23, within which exhaust valve spring 24 is contained, abutting 85 against the lug 25 of the cylinder head 26. The outlet passage 27 is connected with piping to the condenser. The gear casing is provided kwith extension bars or skids 28, upon which the motor rests and is fastened and secured with screws 29. The extension bars abut against the end plate at its inner surface 30, preventing vibration. The cover 3l for the gear casing is'shown in Figures 4 and 5, and is suitably fastened thereto. 95

Flanges 32 and 33 hold the end and cylinder flanges in place byl means of bolting 34 and 35. The piston is provided with piston from which, on the suction stroke of the piston it enters the passages 19 and 20, passing through the open inlet valve situated at 21, and into the cylinder. On the compression stroke, the inlet valve at 21 closes, the outlet valve 22 opens, and the lluid passes into the exhaust chamber 23,

through the outlet passage 27, and into the v condenser. rl`he piston is automatically lubricated by oil from the oil reservoirs 14, the oil channels 15 entering the cylinder 12 at such points that the terminals of these channels are always covered by the piston 11, regardless of its position, thus preventing any of the oil from directly entering into the cylinder. The gears 4 and 5 are also self-lubricated by lubricating grease which fills the casing 8.

The cylinder -lange 13 and the gear casing 8 are so designed that each serves several purposes. The flange contains, all within its body, the compressor cylinder, a complete lubricating system for the compressor piston, inlet ports, an exhaust chamber, outlet ports for the refrigerating fluid, and serves.

as an end flange for casing 1. The gear casing 8 is designedto ysupport the gears, to permit self-lubrication of these gears, and with the aid of the extension bars, serves as a supporting base for the motor. The overall dimensions of this gear casing with its extension bars is exactly-equal to the inside dimensions of the outer casing 1 from flange to flange, so that horizontal movement of the motor-gear casing unit is prevented; hence the gear casing also functions as a means to eliminate vibration and allow silent operation.

As the compressor is entirely enclosed within a sealed casing, there is no danger of any of the gases escaping into the atmosphere, as is often the case where tne reciproeating part moves through an exposed stuffing box. Besides, the adaptability of this unit to carbon dioxide, in particular, as the refrigerating luid, or to other similar luids, gives it an additional degree of safety not afforded by machines adapted for ammonia or other dangerous fluids.

Easy access to the exhaust chamber, exhaust valve, and cylinder is possible by removing the cylinder head 26 from the lian e 13, so that inspection of those-'parts can be made in simple manner.

The motor and gear casing are so connected that they can be both withdrawn, as a unit, from the outer casing, by removing the cylinder flange 13, so that they can be 1 nspected and parts replaced with great facility. The arrangement also permits o simple assembly, as the motor, gearing, gear casing, and piston can be independently assembled and then inserted into the outer casing 1 as a unit. This simple assembly helps greatly in reducing the labor element entering into the cost o? manufacture- What I,claim is:

1. In -a compressor for refrigerating units a flanged plate containing, integral with itself, a compressor cylinder, an exhaust chamber and outlet for the refrigerating fluid, and oil reservoirs communicating with the said cylinder through suitably situated oil channels for the automatic lubrication of the compressor cylinder.

2. In a compressor Jfor refrigerating units a flanged plate containing, integral with itself, a compressor cylinder, an exhaust chamber and outlet Vfor the relrigerating iuid, and oil reservoirs for the lubrication of the compressor piston, said compressor cylinder consisting of a cylindrical bore beginning at one face of said plate and extending into an enlarged concentrically arranged cylindrical bore terminating at the other face of said plate, said enlarged bore constituting the exhaust chamber and being suitably connected with an outlet for the refrigerant, and said oil reservoir comprising one or more suitably enclosed cylindrical compartments with axes 10e parallel to that of said compressor cylinder, and being connected with said compressor cylinder by suitable communicating channels.

3. In a compressor for refrigerating units, 105 a hollow enclosed casing containing on its interior surface and integral with itself a bearing for gearing, and suitablevopenings for gear shafting and compressor piston, said casing being provided at one end With 1.10 two parallel extension bars serving as support for a motor and as an abutment for said casing to prevent its horizontal vibrationsubstantially as described.

4. A compressor for .refrigerating units 115 comprising a hollow, tubular, o n-ended casing suitably sealed at one end with an endplate containing an inlet opening for the refrigerating fluid; an electric motor; a system of bevel gearing with eccentric directly 120 connecting said motor with compressor iston;a gear casing substantially as descri d in claim 3, said gear casing containing said gearing and so set into said tubular casing `that the parallel ex-tension bars of said gear an eccentric on said gearing to allow recipand :Vcylinder head plate, suitabl secured rocating motion of the piston; aninlet valve and sealed to said flanged plate, an contain- 10 situated at the head end of said compressor ing a hollow lug serving as an abutment for -pistong a Banged plate containing comsaid exhaust valve spring, substantially as presser cylinder, gas outlet and lubricating described.

reservoir substantially as described in claim In testimony whereof I aflix my signa- 3; an outlet valve with spring situated in ture.

the exhaust chamber of said flanged plate; 'WILLIAM WILSON. 

